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JOSEPH W. WEBB, OF WASHINGTON, DISTRICT OF COLUMBIA.

PORTABLE DOOR-LOCK.

Specification of Letters Patent No. 10,511, dated February 7, l1854:.

To all whom, t may concern.'

Be it known that I, JOSEPH W. WEBB, of Washington, in the District of Columbia, have invented a new and useful portable door-lock, the same being an imp-rovement on the portable door-lock for which a patent was granted to Samuel P. Kittle on the 7th day of June, A. D. 1853, and which is particularly adapted to the use of persons traveling, to be used on the doors of lodgingroomsA when there are no locks or bolts or where they are deemed insufficient 'for securing the occupant against the intrusion of thieves and burglars; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawings, making a part of this specification, in` which like letters represent corresponding parts.

A is an iron bar about two inches in length, one inch and a quarter wide by one eigthth of an inch thick, out of the forward end of which a piece' is cut between its outer edges suflicient'to leave two pieces eX- tending from the main part of the bar about a quarter of an inch in width. These pieces are then liledto a feather edge and turned up about a quarter of an inch in height, as represented at b, in such manner as to form with the inner face of the main bar A an angle of about one half of forty five degrees, so that the points or edges of the claws will form a considerable inclination toward the rear end of said bar, the object of such inclination being for the purpose of more effectually driving said claws into the casing of the door upon pressure being applied on the outside of the door to force it open, the effect of such pressure being to more firmly drive the claws into the casing. In bot-h edges of the bar at c, small notches are cut, into which the thumb piece B drops when run upon the bar. The notches c are cut in both edges of the bar A, so that my lock can be used on doors which open either to the right or left.

The thumb piece B is made of iron, and is a bar about two and a half inches long, with both ends turned up rounding, and has a longitudinal opening Z through it, suffi-y cient in width and length yto admit of its being run upon the'bar A. This thumb piece 1s self adjusting, and when run upon the bar A drops down, as may be desired,

into either one of the notches o, thus form# case I use a crack piece E of thesame material and Awidth as the bar A and'about three fourths of an inch long, with one-end a quarter of an inch Ythick and tapering down to an edge at itsother end. 4rlhis piece"y has a pintle f on its face side to fit the hole g in the bar A when it is used, andbeing tapering on the side opposite its face Vside 'l door short of using violent ine-ans to effect upon 1t.

The operation'of using the lock is 'as fol-y Y lows: The bar A is placed with its clawsI b j against that part o-f the door-casing which corresponds withthe edge of the door rwhen closed. The claws are slightly driven into the wood by pressure ofthe hand upon the bar A. The door being then closed, forces the claws firmly into the casing. The thumb 1 piece B is then run upon the bar, drops down into one of the notches c closest toV the door, and the operator Vfinds the door effectually locked against all persons on the outside of the room, and without the possi-` bility of picking the lock or opening the door short of using Violent means to effect an entrance.

What I claim as my invention and desire to` secure by Letters Patentis- The claws b in combination withV the barv A and thumb piece B, constructed in the manner and for the purpose herein described. Y

JOSEPH W. WEBB. Witnesses:

, DE WITT C. LAWRENCE,

JAMES DOBBYN. 

